Skip Navigation

weather.gov

NOAA - Click to go to the NOAA homepage National Weather Service Advanced Hydrologic Prediction Service NWS logo - Click to go to the NWS homepage
Navbar left image Home News Organization
Navbar End cap

Swannanoa River at Biltmore, NC (BLTN7)


Data Type




Inundation Levels
NAVD88 Stage

Record Crest: 20.7 ft
1,996.0 19.7
1,995.5 19.2
1,995.0 18.7
1,994.5 18.2
1,994.0 17.7
1,993.5 17.2
1,993.0 16.7

Major Flooding Begins

1,992.5 16.2
1,992.0 15.7
1,991.5 15.2
1,991.0 14.7

Moderate Flooding Begins

1,990.5 14.2
1,990.0 13.7
1,989.5 13.2
1,989.0 12.7
1,988.5 12.2
1,988.0 11.7
1,987.5 11.2
1,987.0 10.7
1,986.5 10.2

Minor Flooding Begins

1,986.0 9.7
1,985.5 9.2

Near Flooding Begins

1,985.0 8.7
1,984.5 8.2
1,984.0 7.7
1,983.5 7.2
1,983.0 6.7
1,982.5 6.2
1,982.0 5.7
1,981.5 5.2
1,981.0 4.7
1,980.5 4.2
* = Extended rating
Weather Forecast Office Greenville-Spartanburg, SC Lower Mississippi River Forecast Center

Loading inundation layers...

Hydrograph River at a Glance Download Inundation
Mapping
Find your location by address or ZIP code:

Click on mapped inundation to see water depth values for that location.

Current Stage:
1.5 ft at 09/23/2014 22:00:00 UTC
Selected Inundation
Mouse Location

North Arrow

Inundation Legend Inundation Legend
USGS Gauge Location Gauge Location

Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Gauge Information Collapse

Map Overlays

Flood Categories (in feet)
Major Flood Stage:16.5
Moderate Flood Stage:14.5
Flood Stage:10
Action Stage:9

Historical Crests
(1) 20.70 ft on 07/16/1916
(2) 19.22 ft on 09/08/2004
(3) 19.00 ft on 08/13/1940
(4) 18.74 ft on 08/16/1928
(5) 18.00 ft on 05/01/1945
Show More Historical Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.65 ft on 07/17/1936
(2) 0.85 ft on 07/22/1986
(3) 0.96 ft on 11/07/1939
(4) 0.97 ft on 10/15/1941
(5) 1.01 ft on 09/12/2002
Show More Low Water Records

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Extended rating:
Rating Curve Extension - The Rating Curve Extension is calculated by using either a linear, logarithmic, or hydraulic technique to extend the rating curve above the currently established relationship between stage and flow.

Flood Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
26 RECORD FLOOD STAGES WILL CAUSE SERIOUS DISRUPTION OF ACTIVITIES IN THE VALLEY. MODERATE FLOODING WILL OCCUR BETWEEN AZALEA STREET AND CHEESBOROUGH BRIDGE.
21.5 EXPECT NEAR RECORD FLOODING IN BILTMORE VILLAGE...CAUSING DISRUPTION OF ACTIVITIES IN THE VALLEY.
19 MAJOR FLOODING OF BUSINESSES AND HOMES WILL OCCUR ALONG THE RIVER BETWEEN CHEESBOROUGH BRIDGE AND STONER ROADS. AT THIS LEVEL FLOODING WILL BE SIMILAR TO THE FLOOD THAT OCCURRED ON SEPTEMBER 8 2004 WITH HURRICANE FRANCES.
18.5 MAJOR FLOODING BETWEEN THE RIVER AND BROCK STREET WILL EXTEND OVER TO SWAN...BOSTON AND ANGLE STREETS.
18 MAJOR FLOODING OF BUSINESSES AND HOMES ALONG THE RIVER WILL OCCUR DOWNSTREAM OF STONER ROAD. PARTS OF THE NORFOLK SOUTHERN RAILROAD WILL BE FLOODED.
16.51 MAJOR FLOOD STAGE...THE BILTMORE AVENUE ROAD NORTH AND SOUTH OF THE BRIDGE WILL BE FLOODED. MOST BUILDINGS AND OTHER AREAS WILL BE FLOODED BETWEEN THE RIVER AND NORFOLK SOUTHERN RAILROAD TRACKS. AT THIS LEVEL FLOODING WILL BE SIMILAR TO THE FLOOD OF SEPTEMBER SEVENTEENTH 2004.
15.5 MODERATE FLOODING CONTINUES...BUILDINGS AND OTHER AREAS BETWEEN THE RIVER AND BROCK AND FAIRVIEW ROADS WILL BE FLOODED.
15 MODERATE FLOODING OF BUILDINGS ALONG BROOK STREET...HENDERSONVILLE ROAD AND DECATUR STREET WILL BEGIN. WATER REACHES SWEETEN CK RD BETWEEN BILTMORE AVE AND LONDON RD.
14.5 MODERATE FLOODING BEGINS...SWEETEN CREEK ROAD WILL BE CLOSED ALONG THE SWANNANOA RIVER RD EAST OF BILTMORE AVENUE. BILTMORE VILLAGE WILL BE FLOODED.
12 WATER WILL BEGIN TO FLOOD SOME BUILDINGS ON GARFIELD STREET. MOST AREAS ALONG SWANNANOA RIVER ROAD... FROM CALEDONIA ROAD TO BILTMORE AVE WILL BE FLOODED.
11.5 WATER REACHES SOME BUILDINGS ALONG GARFIELD STREET BUT DOES NOT GET INTO THE BUILDINGS.
10 FLOOD STAGE- THE RIVER WILL CAUSE BACKWATER EFFECTS ON SWEETEN CREEK...WHICH WILL APPROACH SOME BUILDINGS ALONG GARFIELD ROAD. WATER WILL BEGIN FLOODING PARTS OF NC 81...CALEDONIA ROAD TO GLENDALE ROAD AND APPROACHS THOMPSON AND LODGE ROADS.
9 THE DEER PARK-BILTMORE ESTATES BRIDGE WILL LIKELLY BE OVERTOPPED.
8.5 BANKFULL STAGE...LOW LYING AREAS BETWEEN SWANNONOA RIVER ROAD AND THE RIVER WILL BEGIN TO FLOOD. BACKWATER ON SWEETEN CREEK WILL ALSO START TO FLOOD LOW LYING AREAS NEAR THE CREEK.
Photos
(1) Biltmore staff gages- readings are at top of staff gage
(2) Swannanoa River at Biltmore looking downstream
(3) Swannanoa River at Biltmore looking upstream
Other Data Sources Collapse
Additional Information Collapse
Ensemble Quantitative Precipitation Forecast (QPF) Hydrographs for this site are now available at: http://www.crh.noaa.gov/crh/rfc/RFCoutputMap.php?gph=P&lid=BLTN7&hsa=GSP&rfc=lmrfc (best view with FireFox software)
Resources Collapse
Hydrologic Resources
Additional Resources
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Ask Questions/Webmaster
Page last modified: 15-Jul-2014 6:27 PM
Disclaimer
Credits
Glossary
Privacy Policy
About Us
Career Opportunities
Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.